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Rifles, Reloading, Optics, Equipment
Reloading
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<blockquote data-quote="codyadams" data-source="post: 2107531" data-attributes="member: 87243"><p>In addition to what MagnumManiac said, another thing to look at is case fill. Generally, the powders that provide near 100% case fill will also provide the best velocities and consistency, but this isn't set in stone. Another aspect to velocity that is unrelated to burn rate is energy potential. For instance, Reloder 26 and H1000 are very close on a burn rate chart, but you will essentially always get better velocity with rl26. The denseness of the powder also comes into play, in my .260 AI, I can easily fit 49 grains of rl26 for my accurate load, and reach max pressure around 51, however when I tried H1000, I never was able to reach max pressure before I was out of case capacity, and my velocity was almost 200 fps lower than rl26, but yet they are very close on a burn chart. </p><p></p><p>There is way more information on this subject than I know for sure, and just keep an open mind and realize that not all things correlate to one another. Things can get complicated when working with wildcats or certain very low engraving pressure bullets like the absolute hammers, that can throw even a very educated reloader for a loop. </p><p></p><p>As far as pressure differences, I have seen it where they come out with a new powder and it gives these amazing velocities, but when you look deeper into it, there is 10,000 psi of difference between the new powder and the old one they are comparing to. Part of me thinks it is simply advertising, so they can say this powder does so much better, when it's just a higher pressure load. Others say that it is because certain powders get less stable at the higher pressures. Bottom line, it is vitally important to learn how to read pressure signs. If a load is listed at only 50,000 psi, there is a fair chance you can load higher, but only if you know what your doing and what to look for so that you can stay safe and keep all your digits.</p></blockquote><p></p>
[QUOTE="codyadams, post: 2107531, member: 87243"] In addition to what MagnumManiac said, another thing to look at is case fill. Generally, the powders that provide near 100% case fill will also provide the best velocities and consistency, but this isn't set in stone. Another aspect to velocity that is unrelated to burn rate is energy potential. For instance, Reloder 26 and H1000 are very close on a burn rate chart, but you will essentially always get better velocity with rl26. The denseness of the powder also comes into play, in my .260 AI, I can easily fit 49 grains of rl26 for my accurate load, and reach max pressure around 51, however when I tried H1000, I never was able to reach max pressure before I was out of case capacity, and my velocity was almost 200 fps lower than rl26, but yet they are very close on a burn chart. There is way more information on this subject than I know for sure, and just keep an open mind and realize that not all things correlate to one another. Things can get complicated when working with wildcats or certain very low engraving pressure bullets like the absolute hammers, that can throw even a very educated reloader for a loop. As far as pressure differences, I have seen it where they come out with a new powder and it gives these amazing velocities, but when you look deeper into it, there is 10,000 psi of difference between the new powder and the old one they are comparing to. Part of me thinks it is simply advertising, so they can say this powder does so much better, when it's just a higher pressure load. Others say that it is because certain powders get less stable at the higher pressures. Bottom line, it is vitally important to learn how to read pressure signs. If a load is listed at only 50,000 psi, there is a fair chance you can load higher, but only if you know what your doing and what to look for so that you can stay safe and keep all your digits. [/QUOTE]
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